docs: def _load(self, scale=0.001):
          """Load the Landsat OLI relative spectral responses
          """
  
          with open_workbook(self.path) as wb_:
              for sheet in wb_.sheets():
                  if sheet.name in ['Plot of AllBands', ]:
                      continue
                  ch_name = OLI_BAND_NAMES.get(sheet.name.strip())
  
                  if ch_name != self.bandname:
                      continue
  
                  wvl = sheet.col_values(0, 2)
                  resp = sheet.col_values(1, 2)
  
                  self.rsr = {'wavelength': np.array(wvl) / 1000.,
                              'response': np.array(resp)}
                  break